/*------------------------------------------------------------------------*/
/* Sample Code of OS Dependent Functions for FatFs                        */
/* (C)ChaN, 2018                                                          */
/*------------------------------------------------------------------------*/

#include <stdlib.h>

#include "ff.h"


#if FF_USE_LFN == 3	/* Dynamic memory allocation */

/**
 * Allocate a memory block
 * Returns pointer to the allocated memory block (null if not enough core)
 * @msize:Number of bytes to allocate
 */
void* ff_memalloc(UINT msize)
{
	return pvPortMalloc(msize);
}


/*------------------------------------------------------------------------*/
/* Free a memory block                                                    */
/*------------------------------------------------------------------------*/

/**
 * Free a memory block
 * @mblock:Pointer to the memory block to free (nothing to do if null)
 */
void ff_memfree(void* mblock)
{
	vPortFree(mblock);
}

#endif



#if FF_FS_REENTRANT	/* Mutal exclusion */

/* Create a Synchronization Object
 * This function is called in f_mount() function to create a new
 * synchronization object for the volume, such as semaphore and mutex.
 * When a 0 is returned, the f_mount() function fails with FR_INT_ERR.
 * 1:Function succeeded, 0:Could not create the sync object
 * @vol: Corresponding volume (logical drive number
 * @sobj:Pointer to return the created sync object
*/
int ff_cre_syncobj (BYTE vol, FF_SYNC_t* sobj)
{
	/* Win32 */
	// *sobj = CreateMutex(NULL, FALSE, NULL);
	// return (int)(*sobj != INVALID_HANDLE_VALUE);

	/* uITRON */
//	T_CSEM csem = {TA_TPRI,1,1};
//	*sobj = acre_sem(&csem);
//	return (int)(*sobj > 0);

	/* uC/OS-II */
//	OS_ERR err;
//	*sobj = OSMutexCreate(0, &err);
//	return (int)(err == OS_NO_ERR);

	/* FreeRTOS */
	*sobj = xSemaphoreCreateMutex();
	return (int)(*sobj != NULL);

	/* CMSIS-RTOS */
//	*sobj = osMutexCreate(&Mutex[vol]);
//	return (int)(*sobj != NULL);
}


/*------------------------------------------------------------------------*/
/*                                       */
/*------------------------------------------------------------------------*/
/*
 * Delete a Synchronization Object
 * This function is called in f_mount() function to delete a synchronization
 * object that created with ff_cre_syncobj() function. When a 0 is returned,
 * the f_mount() function fails with FR_INT_ERR.
 * 1:Function succeeded, 0:Could not delete due to an error
 *  @sobj: Sync object tied to the logical drive to be deleted\
 */
int ff_del_syncobj(FF_SYNC_t sobj)
{
	/* Win32 */
	// return (int)CloseHandle(sobj);

	/* uITRON */
//	return (int)(del_sem(sobj) == E_OK);

	/* uC/OS-II */
//	OS_ERR err;
//	OSMutexDel(sobj, OS_DEL_ALWAYS, &err);
//	return (int)(err == OS_NO_ERR);

	/* FreeRTOS */
 	vSemaphoreDelete(sobj);
	return 1;

	/* CMSIS-RTOS */
//	return (int)(osMutexDelete(sobj) == osOK);
}

/*
 * Request Grant to Access the Volume
 * This function is called on entering file functions to lock the volume.
 * When a 0 is returned, the file function fails with FR_TIMEOUT.
 * 1:Got a grant to access the volume, 0:Could not get a grant
 * @sobj: Sync object to wait
*/

int ff_req_grant(FF_SYNC_t sobj)
{
	 /* Win32 */
	// return (int)(WaitForSingleObject(sobj, FF_FS_TIMEOUT) == WAIT_OBJECT_0);

	/* uITRON */
//	return (int)(wai_sem(sobj) == E_OK);

	/* uC/OS-II */
//	OS_ERR err;
//	OSMutexPend(sobj, FF_FS_TIMEOUT, &err));
//	return (int)(err == OS_NO_ERR);

	/* FreeRTOS */
	return (int)(xSemaphoreTake(sobj, FF_FS_TIMEOUT) == pdTRUE);

	/* CMSIS-RTOS */
//	return (int)(osMutexWait(sobj, FF_FS_TIMEOUT) == osOK);
}

/**
 * Release Grant to Access the Volume
 * This function is called on leaving file functions to unlock the volume.
 * @sobj: Sync object to be signaled
*/
void ff_rel_grant(FF_SYNC_t sobj)
{
	/* Win32 */
	// ReleaseMutex(sobj);

	/* uITRON */
//	sig_sem(sobj);

	/* uC/OS-II */
//	OSMutexPost(sobj);

	/* FreeRTOS */
	xSemaphoreGive(sobj);

	/* CMSIS-RTOS */
//	osMutexRelease(sobj);
}

#endif

